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February 2003 2-23
1000-A2-GN22-00 2. CPX-1000 Voice Services Platform Description
12-Port T1 ECAC
Module
The 12-port T1 Echo Cancellation And Compression (ECAC)
module supports twelve T1 connections to the Class 5 switch via
an RJ-21X port, plus onboard echo cancellation and compression.
The 12-port T1 ECAC module consists of two separate cards
(Figure 2–11):
12-port T1 ECAC Processing card—performs T1
processing, plus onboard echo cancellation and
compression.
T1 Transition card—provides twelve T1 interfaces via the
RJ-21X port (attached to a patch panel), plus a Line Interface
Unit (LIU) that inserts framing and supervision signals into
the T1 data stream.
Table 2–6 describes the controls, indicators, and ports of the
12-port T1 ECAC module ports and indicators.
Table 2–5. Octal T1 Module Controls, Indicators, and Ports
Cards Controls, Indicators, and Ports Function
Octal T1 RUN Lights green when processor is active
FAIL Lights if module fails
T1 Port Indicators (8) Lights if carrier fails or no carrier is
present on the indicated port
ACT Not used
LINK Not used
Ethernet Not used
DIAG Reserved for factory use only
T1 Transition
Power Both cards are powered
8 RJ-48C jacks For T1/DS1 cables to Class 5 switch